Poniewozik, Paweł, Maja Pernal, Joanna Mioduszewska, Paweł Rot, Piotr Poniewozik, Natalia Dziuba, Aleksandra Sim, Andrzej Zuzak, Zofia Roguska, and Krzysztof Grabowski. 2026. “Postbiotics As Effective and Safe ‘vaccines’ Against Various Respiratory diseases: literature review”. Quality in Sport 54 (April):70813 . https://doi.org/10.12775/QS.2026.54.70813.